#ad{
    display: flex;
    flex-direction: column;
}

.ad-head{
    width: 100%;
    height: 44px;
    line-height: 44px;
    text-align: center;
}
.ad-main{
    background: url(../../images/advertisement-bg.jpg) no-repeat center top;
    background-size: cover;
    flex-grow: 1;
}
a{
    position: absolute;
    right: 20px;
    top: 72px;
    border: 1px solid #fff;
    width: 105px;
    height: 40px;
    background-color: #fff;
    border-radius: 20px;
    text-align: center;
    line-height: 40px;
    color: #000;
    font-size: 14px;
}
p{
    width: 100%;
    text-align: center;
    font-size: 30px;
    color: #fff;
    position: absolute;
    // bottom: 80px;
    animation: move 1s forwards;
}
@keyframes move{
    0%{
        bottom: -20px;
        opacity: 0;
        font-size: 12px;
    }
    50%{
        bottom: 200px;
        opacity: 1;
        font-size: 50px;
    }
    100%{
        bottom: 80px;
        opacity: 1;
        font-size: 30px;
    }
}